This study aimed to: (1) describe the activities of the ROHIS organization at SMA Negeri 17 Makassar; (2) describe the social behavior of students at SMA Negeri 17 Makassar; and (3) analyze the influence of students' activities in ROHIS organizational activities on the social behavior of students in the school environment at SMA Negeri 17 Makassar. This research was of the quantitative type, post facto. As a representative sample of the entire population,88 students were chosen. The instrument used was a questionnaire to measure the social behavior and activities of the Spiritual Islamic Organization (Rohis). The results revealed a simple linear regression equation with a regression coefficient of 0.260 and a 1% increase in ROHIS organizational activities (X) and increasing social behavior (Y). The regression coefficient with a positive value indicates that ROHIS organizational activities (X) have a positive effect on the social behavior of students (Y) with the regression equation Y = 60,621 + 0.260X. The hypothesis test also shows a significance value (Sig.) of 0.003, which is smaller than the probability value of 0.05, so it can be said that there is an influence of ROHIS organizational activities on students' social behavior.